System and method for token domain control

ABSTRACT

A method for providing a token code in conjunction with a value token is disclosed. The token code serves as a shared secret for authenticating the use of the value token. Multiple token holders can possess the same value token, but each token holder may have a different token code for use with the value token.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a non-provisional application of and claims thebenefit of the filing date of U.S. Provisional Application No.61/988,815, filed on May 5, 2014, which is herein incorporated byreference in its entirety for all purposes.

BACKGROUND

Current implementations of token systems could be improved. For example,in some cases, there may be an insufficient amount of possible uniquetoken values. This may be an issue when multiple tokens are issued forone user account. A unique token may be issued for each domain in whichthe payment account is used, and tokens may be regularly refreshed(e.g., one-time use tokens). Current token formats only allow a certainamount of variation, so eventually all possible unique values may beexhausted.

Another issue is that users have historically been recognized by variousentities through their primary account numbers. User activity tracking,loyalty programs, activity analysis, and other programs have been basedon PAN usage. When the PAN is replaced with multiple tokens, each tokenmay appear to be a different account to certain entities (e.g.,acquirers), and thus these entities may not be able to determine thetotal activity for a given account. Accordingly, using tokens instead ofprimary account numbers can be disruptive.

Embodiments of the invention address these and other problems,individually and collectively.

SUMMARY

One embodiment of the invention is directed to a method. The methodcomprises receiving, by a data processor in a token service computer, afirst token request from a first token requestor computer, the firsttoken request including a value credential and a first domainidentifier. The method also comprises identifying a value tokenassociated with the value credential, generating a first token codeassociated with the value token, assigning the value token and the firsttoken code to the first domain identifier, and transmitting the valuetoken and the first token code to the first token requestor computer.The first token requestor subsequently uses the value token for aninteraction, and the first token requestor's subsequent use of the valuetoken is valid if the value token is accompanied by the first tokencode.

In another embodiment, the method further comprises receiving a secondtoken request from a second token requestor computer, the second tokenrequest including the value credential and a second domain identifier.The method also comprises identifying the value token associated withthe value credential generating a second token code associated with thevalue token assigning the value token and the second token code to thesecond domain identifier, and transmitting the value token and thesecond token code to the second token requestor computer. The secondtoken requestor subsequently uses the value token for an interaction,and the second token requestor's subsequent use of the value token isvalid if the value token is accompanied by the second token code.

Another embodiment of the invention is directed to a token servicecomputer configured to perform the above-described method.

Another embodiment of the invention is directed to a method comprisingreceiving, by a token service system, a first authorization requestmessage including a value token, a first token code, and a first domainidentifier. The method also comprises determining that the first tokencode is associated with the value token, determining that the valuetoken and the first token code are assigned to the first domainidentifier, identifying a value credential associated with the valuetoken, adding the value credential to the first authorization requestmessage, sending the first authorization request message to anauthorizing entity computer, receiving a first authorization responsemessage including the value credential from the authorizing entitycomputer, replacing the value credential with the value token and thefirst token code in the first authorization response message, andforwarding the first authorization response message.

In another embodiment, the method further comprises receiving, by thetoken service system, a second authorization request message including avalue token, a second token code, and a second domain identifier. Themethod also comprises determining that the second token code isassociated with the value token, determining that the value token andthe second token code are assigned to the second domain identifier,identifying a value credential associated with the value token, addingthe value credential to the second authorization request message,sending the second authorization request message to the authorizingentity computer, receiving a second authorization response messageincluding the value credential from the authorizing entity computer,replacing the value credential with the value token and the second tokencode in the authorization response message, and forwarding theauthorization response message.

Another embodiment of the invention is directed to a token servicesystem configured to perform the above-described method.

Further details regarding embodiments of the invention can be found inthe Detailed Description and the Figures.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a block diagram of a system according to an embodiment ofthe invention.

FIG. 2 shows a block diagram of a token vault computer according to anembodiment of the invention.

FIG. 3 shows a block diagram of an exemplary mobile device according toan embodiment of the invention.

FIG. 4 shows a block diagram of a merchant computer according to anembodiment of the invention.

FIG. 5 shows a block diagram illustrating the use of token codes forvarious domains, in accordance with some embodiments of the invention.

FIG. 6 shows a flow diagram illustrating a method according toembodiments of the invention.

FIG. 7 shows a flow diagram illustrating a method for sharing a tokenaccording to embodiments of the invention.

FIG. 8 shows a block diagram of a computer apparatus according to anembodiment of the invention.

DETAILED DESCRIPTION

Embodiments of the present invention are directed to providing, inaddition to a value token, a token code to a token requestor. The tokencode can serve as a shared secret between a token holder and a tokenvault. Both the value token and the token code can be provided togetherduring a transaction, and the token code can be used to authenticatethat the token holder is authorized to use the value token.

In some embodiments, one value token can be provided for use in multipledomains. Each domain may receive a different token code along with thevalue token. If the value token is received for a transaction through acertain domain, it may only be considered valid if accompanied by theappropriate token code for that domain.

As discussed above, using value tokens can lead to a token numericissue. For example, a typical PAN (payment account number) is composedof 16 digits. If each digit can range from 0-9, than there are 10¹⁶possible unique PANs. However, certain digits within a PAN are sometimesoccupied by various types of identification information. For example,the first six digits may be used to indicate a BIN (bank identificationnumber). Other digits may be used for other purposes, such as the finaldigit being used as a checksum. In some embodiments, the number ofdigits used to actually identify a specific account may be as low as (orlower than) 9 digits. In the example of 9 digits, there are now only10⁹, or one billion, possible unique values. Considering that there maybe many millions of account holders, that there may be multiple tokensassociated with each account at any given time, and that each tokenmight be refreshed regularly (e.g., once a week, after each transaction,etc.), it can be seen that one billion unique values may not be enoughto accommodate tokenization applications.

Embodiments of the invention solve this issue by providing one valuetoken for use in multiple token domains, along with a different tokencode for each domain. Instead of increasing token proliferation (e.g.,by issuing a different value token to every domain, by constantlyrefreshing value tokens, etc.), a single value token can be issued toeach domain for a certain payment account. Current token formats mayprovide enough possible token values to accommodate a single uniquevalue token per payment account. For example, one billion values may besufficient for each account holder to have a unique token value. Thetoken code allows the single value token to be widely distributedwithout sacrificing security, as a token code may be required when usingthe value token, and token codes may only be provided to (and valid for)domains that are authorized to use the value token.

This can also solve the issue of tracking users. As described above,incorporating token codes allows a payment account to be uniquelyrepresented by a single value token across all domains. Accordingly,entities (e.g., acquirers and merchants) that previously used a PAN totrack user activity can now simply use the value token instead (as itmay be provided during transactions instead of the PAN). Thus, entitiescan essentially continue tracking user activity as usual. In some cases,the value token may be formatted similarly to a PAN, so entities may notbe able to distinguish between a value token and a PAN, and they may noteven notice that anything changed. For example, a value token be a 16digit number, such as “4146 7238 9345 7895”. Acquirers and merchants mayuse the entire number, or a portion of the number (such as field 2, thelast four digits “7895”, etc.) to identify an account and/or user. Whencommunicating about the user, entities may refer to the user by thevalue token “4146 7238 9345 7895”. Also, when identifying which user isparticipating in a transaction, acquirers and merchants identify a userrecord based on the value token “4146 7238 9345 7895”.

This token code system may be easily adopted by merchants, acquirers,and other relevant entities. Minimal changes are needed for existingsystems (e.g., user activity tracking remains the same, as describedabove). Token holders may simply store an extra value (the token code),and other entities may simply pass the token code along in authorizationrequest and response messages. In some embodiments, the token code maybe able to fit within existing authorization message formats withoutrequiring any changes. Thus, a token system that increases paymentsecurity can be introduced with minimal interruptions.

Prior to discussing specific embodiments of the invention, some termsmay be described in detail.

An “interaction” may include a communication, contact, or exchangebetween parties, devices, and/or entities. In some embodiments, data canbe exchanged in an interaction between two devices (e.g., an interactionbetween a mobile device and an access device).

A “value credential” may be information associated with worth. Examplesof a value credential include payment credentials, information needed toobtain a promotional offer, etc.

“Payment credentials” may include any suitable information associatedwith an account (e.g. a payment account and/or payment device associatedwith the account). Such information may be directly related to theaccount or may be derived from information related to the account.Examples of account information may include a PAN (primary accountnumber or “account number”), user name, expiration date, CVV (cardverification value), dCVV (dynamic card verification value), CVV2 (cardverification value 2), CVC3 card verification values, etc. CVV2 isgenerally understood to be a static verification value associated with apayment device. CVV2 values are generally visible to a user (e.g., aconsumer), whereas CVV and dCVV values are typically embedded in memoryor authorization request messages and are not readily known to the user(although they are known to the issuer and payment processors). Paymentcredentials may be any information that identifies or is associated witha payment account. Payment credentials may be provided in order to makea payment from a payment account. Payment credentials can also include auser name, an expiration date, a gift card number or code, and any othersuitable information.

“Tokenization” is a process by which data is replaced with substitutedata. For example, a payment account identifier (e.g., a primary accountnumber (PAN)) may be tokenized by replacing the primary accountidentifier with a substitute number (e.g. a token) that may beassociated with the payment account identifier. Further, tokenizationmay be applied to any other-information which may be replaced with asubstitute value (i.e., token). Tokenization may be used to enhancetransaction efficiency, improve transaction security, increase servicetransparency, or to provide a method for third-party enablement.

A “value token” may be an identifier for worth. Examples of a valuetoken include payment tokens, a coupon identifier, etc.

A “payment token” may include an identifier for a payment account thatis a substitute for an account identifier, such as a primary accountnumber (PAN). For example, a token may include a series of alphanumericcharacters that may be used as a substitute for an original accountidentifier. For example, a token “4900 0000 0000 0001” may be used inplace of a PAN “4147 0900 0000 1234.” In some embodiments, a token maybe “format preserving” and may have a numeric format that conforms tothe account identifiers used in existing transaction processing networks(e.g., ISO 8583 financial transaction message format). In someembodiments, a token may be used in place of a PAN to initiate,authorize, settle or resolve a payment transaction or represent theoriginal credential in other systems where the original credential wouldtypically be provided. In some embodiments, a token value may begenerated such that the recovery of the original PAN or other accountidentifier from the token value may not be computationally derived.Further, in some embodiments, the token format may be configured toallow the entity receiving the token to identify it as a token andrecognize the entity that issued the token.

A “token code” may be any string of characters that serve as evidence ofpermission for using a value token (e.g., a payment token). In someembodiments, a token code may be a hexadecimal value. In otherembodiments, a token code could be any other alphabetical, numeric, oralphanumeric value. For example, in some embodiments, a token code maybe composed of five characters, or any other suitable number ofcharacters. A token code may also be a random or otherwise un-guessablevalue. A token code may be issued to a holder of a value token, and thetoken code may be able to validate the value token. The combination ofthe token code and a value token may constitute a unique combination. Atoken code may also be associated with a domain ID (e.g., that indicatesa token domain), such that a value token is validated by a token codeand an associated domain ID. In some embodiments, a token code may beunique for a value token to which it is assigned. However, the tokencode may not necessarily be globally unique. For example, the same tokencode could possibly be randomly generated and assigned for a differentvalue token. Thus, running out of unique token codes may not be aconcern.

A “token service system” or “token service computer” can include asystem that that services payment tokens. In some embodiments, a tokenservice system can facilitate requesting, determining (e.g., generating)and/or issuing tokens, as well as maintaining an established mapping oftokens to primary account numbers (PANs) in a repository (e.g. tokenvault). In some embodiments, the token service system may establish atoken assurance level for a given token to indicate the confidence levelof the token to PAN binding. The token service system may include or bein communication with a token vault where the generated tokens arestored. The token service system may support token processing of paymenttransactions submitted using tokens by de-tokenizing the token to obtainthe actual PAN. In some embodiments, a token service system may includea token service computer alone, or in combination with other computerssuch as a transaction processing network computer. Various entities of atokenization ecosystem may assume the roles of the token serviceprovider. For example, payment networks and issuers or their agents maybecome the token service provider by implementing the token servicesaccording to embodiments of the present invention.

In addition to generating and processing payment tokens, a token servicecomputer can generate, issue, and process token codes. For example, atoken service computer can generate and provide a token code for eachdistributed payment token. In some embodiments, a single payment tokencan be distributed to multiple token requestors, but a different tokencode may be provided to each token requestor for the single paymenttoken. Similarly, when de-tokenizing a payment token, the token servicecomputer can verify that a payment token is accompanied by anappropriate token code and/or domain ID.

A “token vault” may be an example of a token service computer and caninclude a repository that maintains established token-to-PAN mappings.According to various embodiments, the token vault may also maintainother attributes of the token requestor that may be determined at thetime of registration. The attributes may be used by the token serviceprovider to apply domain restrictions or other controls duringtransaction processing. In some embodiments, the token vault may be apart of the token service system or the token service provider.Alternatively, the token vault may be a remote repository accessible tothe token service provider. Token vaults, due to the sensitive nature ofthe data mappings that are stored and managed in them, may be protectedby strong underlying physical and logical security.

“Token exchange” or “de-tokenization” can include a process of restoringthe data that was substituted during tokenization. For example, a tokenexchange may include replacing a payment token with a correspondingprimary account number (PAN) that was associated with the payment tokenduring tokenization of the PAN. Thus, the de-tokenization may refer tothe process of redeeming a token for the associated PAN value based on atoken-to-PAN mapping stored, for example, in a token vault. The abilityto retrieve a PAN in exchange for the associated token may be restrictedto specifically authorized entities, individuals, applications, orsystems. Further, de-tokenization or token exchange may be applied toany other information. In some embodiments, token exchange may beachieved via a transactional message, such as an ISO message, anapplication programming interface (API), or another type of webinterface (e.g., web request).

A “token requestor” include an entity that requests a token. The tokenrequestor may initiate a request that a primary account number (PAN) betokenized by submitting a token request message to the token serviceprovider. According to various embodiments, a token requestor may nolonger need to store a PAN associated with a token once the requestorhas received a requested token. The requestor may be an application, adevice, a process, or a system that is configured to perform actionsassociated with tokens. A token requestor can request registration witha network token system, request token generation, token activation,token de-activation, token exchange, token lifecycle management relatedprocesses, and/or any other token related processes. A requestor mayinterface with a network token system through any suitable communicationnetworks and/or protocols (e.g., using HTTPS, SOAP and/or an XMLinterface among others). Some non-limiting examples of token requestorsmay include, for example, communication devices (e.g., mobile phones andcomputers) operated by users, card-on-file merchants, acquirers,acquirer processors, and payment gateways acting on behalf of merchants,payment enablers (e.g., original equipment manufacturers, mobile networkoperators, etc.), digital wallet providers, issuers, third party walletproviders, and/or transaction processing networks. In some embodiments,a token requestor can request tokens for multiple domains and/orchannels. A token requestor may be registered and identified uniquely bythe token service provider within the tokenization ecosystem. Duringtoken requestor registration, the token service provider may formallyprocess the token requestor's application to participate in the tokenservice system. The token service provider may collect informationpertaining to the nature of the requestor and the relevant use of tokensto validate and formally approve the token requestor and establishappropriate domain restriction controls. Successfully registered tokenrequestors may be assigned a domain ID that may also be entered andmaintained within the token vault. Token requestors may be revoked orassigned new domain ID. This information may be subject to reporting andaudit by the token service provider.

A “token domain” may indicate an area and/or circumstance in which atoken can be used. Examples of the token domain may include, but are notlimited to, payment channels (e.g., e-commerce, physical point of sale,etc.), POS entry modes (e.g., contactless, magnetic stripe, etc.), andmerchant identifiers to uniquely identify where the token can be used. Aset of parameters (i.e. token domain restriction controls) may beestablished as part of token issuance by the token service provider thatmay allow for enforcing appropriate usage of the token in paymenttransactions. For example, the token domain restriction controls mayrestrict the use of the token with particular presentment modes, such ascontactless or e-commerce presentment modes. In some embodiments, thetoken domain restriction controls may restrict the use of the token at aparticular merchant that can be uniquely identified. Some exemplarytoken domain restriction controls may require the verification of thepresence of a token cryptogram that is unique to a given transaction. Insome embodiments, a token domain can be associated with a tokenrequestor. For example, a token requestor may request tokens for acertain domain, and both the token requestor and domain may beidentified by a certain domain ID.

A “domain identifier (ID)” may include an identifier for a token domainand/or a token requestor. It may include any characters, numerals, orother identifiers associated with an entity associated with a networktoken system. In some embodiments, a unique domain ID may be assignedfor each domain associated with the same token requestor. For example, adomain ID can identify a pairing of a token requestor (e.g., a mobiledevice, a merchant, a mobile wallet provider, etc.) with a token domain(e.g., e-commerce, contactless, etc.). A domain ID may include anyformat or type of information. For example, in one embodiment, thedomain ID may include an alphanumerical value such as a ten digit or aneleven digit letter and/or number (e.g., 4678012345). In someembodiments, a domain ID may include a code for a token service provider(e.g., first 3 digits) such as the network token system and theremaining digits may be assigned by the token service provider for eachrequesting entity (e.g., mobile wallet provider) and the token domain(e.g., contactless, e-commerce, etc.).

“Token expiry date” may refer to the expiration date/time of the token.The token expiry date may be passed among the entities of thetokenization ecosystem during transaction processing to ensureinteroperability. The token expiration date may be a numeric value (e.g.a 4-digit numeric value).

A “mobile device” may comprise any suitable electronic device that maybe transported and operated by a user, which may also provide remotecommunication capabilities to a network. Examples of remotecommunication capabilities include using a mobile phone (wireless)network, wireless data network (e.g. 3G, 4G or similar networks), Wi-Fi,Wi-Max, or any other communication medium that may provide access to anetwork such as the Internet or a private network. Examples of mobiledevices include mobile phones (e.g. cellular phones), PDAs, tabletcomputers, net books, laptop computers, personal music players,hand-held specialized readers, etc. Further examples of mobile devicesinclude wearable devices, such as smart watches, fitness bands, anklebracelets, rings, earrings, etc., as well as automobiles with remotecommunication capabilities. A mobile device may comprise any suitablehardware and software for performing such functions, and may alsoinclude multiple devices or components (e.g. when a device has remoteaccess to a network by tethering to another device—i.e. using the otherdevice as a modem—both devices taken together may be considered a singlemobile device).

A mobile device may also include any suitable device that may be used toconduct a financial transaction, such as to provide payment credentialsto a merchant. Such a mobile device may be in any suitable form. Forexample, suitable mobile devices can be hand-held and compact so thatthey can fit into a user's wallet and/or pocket (e.g., pocket-sized).They may include smart cards, magnetic stripe cards, keychain devices(such as the Speedpass™ commercially available from Exxon-Mobil Corp.),etc. Other examples of mobile devices include pagers, payment cards,security cards, access cards, smart media, transponders, and the like.If the mobile device is in the form of a debit, credit, or smartcard,the mobile device may also optionally have features such as magneticstripes. Such devices can operate in either a contact or contactlessmode.

“Short range communication” or “short range wireless communication” maycomprise any method of providing short-range contact or contactlesscommunications capability, such as RFID, Bluetooth™, infra-red, or otherdata transfer capability that can be used to exchange data between amobile device and an access device. In some embodiments, short rangecommunications may be in conformance with a standardized protocol ordata transfer mechanism (e.g., ISO 14443/NFC). Short range communicationtypically comprises communications at a range of less than 2 meters. Insome embodiments, it may be preferable to limit the range of short rangecommunications (e.g., to a range of less than 1 meter, less than 10centimeters, or less than 2.54 centimeters) for security, technical,and/or practical considerations.

An “application” may be computer code or other data stored on a computerreadable medium (e.g. memory element or secure element) that may beexecutable by a processor to complete a task.

A “digital wallet” can include an electronic device that allows anindividual to conduct electronic commerce transactions. A digital walletmay store user profile information, payment credentials, bank accountinformation, one or more digital wallet identifiers and/or the like andcan be used in a variety of transactions, such as but not limited toeCommerce, social networks, money transfer/personal payments, mobilecommerce, proximity payments, gaming, and/or the like for retailpurchases, digital goods purchases, utility payments, purchasing gamesor gaming credits from gaming websites, transferring funds betweenusers, and/or the like. A digital wallet may be designed to streamlinethe purchase and payment process. A digital wallet may allow the user toload one or more payment cards onto the digital wallet so as to make apayment without having to enter an account number or present a physicalcard.

A “digital wallet provider” may include an entity, such as an issuingbank or third party service provider, that issues a digital wallet to auser that enables the user to conduct financial transactions. A digitalwallet provider may provide standalone user-facing software applicationsthat store account numbers, or representations of the account numbers(e.g., payment tokens), on behalf of a cardholder (or other user) tofacilitate payments at more than one unrelated merchant, performperson-to-person payments, or load financial value into the digitalwallet. A digital wallet provider may enable a user to access itsaccount via a personal computer, mobile device or access device.Additionally, a digital wallet provider may also provide one or more ofthe following functions: storing multiple payment cards and otherpayment products on behalf of a user, storing other informationincluding billing address, shipping addresses, and transaction history,initiating a transaction by one or more methods, such as providing auser name and password, NFC or a physical token, and may facilitatepass-through or two-step transactions.

A “user” may include an individual that may be associated with one ormore personal accounts and/or mobile devices. The user may also bereferred to as a cardholder, account holder, or consumer.

An “issuer” or “authorizing entity” may typically refer to a businessentity (e.g., a bank) that maintains an account for a user.

A “merchant” may typically be an entity that engages in transactions andcan sell goods or services, or provide access to goods or services.

An “acquirer” may typically be a business entity (e.g., a commercialbank) that has a business relationship with a particular merchant orother entity. Some entities can perform both issuer and acquirerfunctions. Some embodiments may encompass such single entityissuer-acquirers.

An “access device” may be any suitable device that provides access to aremote system. An access device may also be used for communicating witha merchant computer, a transaction processing network, an authenticationcomputer, or any other suitable system. An access device may generallybe located in any suitable location, such as at the location of amerchant. An access device may be in any suitable form. Some examples ofaccess devices include POS or point of sale devices (e.g., POSterminals), cellular phones, PDAs, personal computers (PCs), tablet PCs,hand-held specialized readers, set-top boxes, electronic cash registers(ECRs), automated teller machines (ATMs), virtual cash registers (VCRs),kiosks, security systems, access systems, and the like. An access devicemay use any suitable contact or contactless mode of operation to send orreceive data from, or associated with, a user mobile device. In someembodiments, where an access device may comprise a POS terminal, anysuitable POS terminal may be used and may include a reader, a processor,and a computer-readable medium. A reader may include any suitablecontact or contactless mode of operation. For example, exemplary cardreaders can include radio frequency (RF) antennas, optical scanners, barcode readers, or magnetic stripe readers to interact with a paymentdevice and/or mobile device. In the examples provided herein, an accessdevice and merchant computer may be referred to as separate systemcomponents. It should be appreciated, however, that the access deviceand merchant computer may be a single component, for example, onemerchant mobile device or POS device.

An “authorization request message” may be an electronic message that issent to a transaction processing network and/or an issuer of a paymentcard to request authorization for a transaction. An authorizationrequest message according to some embodiments may comply with ISO 8583,which is a standard for systems that exchange electronic transactioninformation associated with a payment made by a user using a paymentdevice or payment account. The authorization request message may includean issuer account identifier that may be associated with a paymentdevice or payment account. An authorization request message may alsocomprise additional data elements corresponding to “identificationinformation” including, by way of example only: a service code, a CVV(card verification value), a dCVV (dynamic card verification value), aPAN (primary account number or “account number”), a payment token, auser name, an expiration date, etc. An authorization request message mayalso comprise “transaction information,” such as any informationassociated with a current transaction, such as the transaction amount,merchant identifier, merchant location, acquirer bank identificationnumber (BIN), card acceptor ID, etc., as well as any other informationthat may be utilized in determining whether to identify and/or authorizea transaction.

An “authorization response message” may be an electronic message replyto an authorization request message generated by an issuing financialinstitution or a transaction processing network. The authorizationresponse message may include, by way of example only, one or more of thefollowing status indicators: Approval—transaction was approved;Decline—transaction was not approved; or Call Center—response pendingmore information, merchant must call the toll-free authorization phonenumber. The authorization response message may also include anauthorization code, which may be a code that a credit card issuing bankreturns in response to an authorization request message in an electronicmessage (either directly or through the transaction processing network)to the merchant's access device (e.g. POS equipment) that indicatesapproval of the transaction. The code may serve as proof ofauthorization. As noted above, in some embodiments, a transactionprocessing network may generate or forward the authorization responsemessage to the merchant.

A “server computer” may include a powerful computer or cluster ofcomputers. For example, the server computer can be a large mainframe, aminicomputer cluster, or a group of servers functioning as a unit. Inone example, the server computer may be a database server coupled to aWeb server. The server computer may be coupled to a database and mayinclude any hardware, software, other logic, or combination of thepreceding for servicing the requests from one or more client computers.The server computer may comprise one or more computational apparatusesand may use any of a variety of computing structures, arrangements, andcompilations for servicing the requests from one or more clientcomputers.

FIG. 1 shows a system 100 comprising a number of components. The system100 comprises a token vault 110, which may be an example of at leastpart of a token service provider computer. The token vault 110 may be incommunication with one or more of a token requestor 115, a merchantcomputer 130, an acquirer computer 135, a transaction processing network140, and an authorizing entity computer 150. Each of the token requestor115, the merchant computer 130, the acquirer computer 135, thetransaction processing network 140, and the authorizing entity computer150 may be embodied by one or more computers.

The user 120 (i.e., a device operated by the user 120) may be incommunication with the token requestor 115, the authorizing entitycomputer 150, and the merchant computer 130. Furthermore, the merchantcomputer 130, the acquirer computer 135, the transaction processingnetwork 140, the authorizing entity computer 150, and a token network145 may all be in operative communication with each other through anysuitable communication channel or communications network. A suitablecommunications network may be any one and/or the combination of thefollowing: a direct interconnection; the Internet; a Local Area Network(LAN); a Metropolitan Area Network (MAN); an Operating Missions as Nodeson the Internet (OMNI); a secured custom connection; a Wide Area Network(WAN); a wireless network (e.g., employing protocols such as, but notlimited to a Wireless Application Protocol (WAP), I-mode, and/or thelike); and/or the like.

The token vault 110 may be associated with the transaction processingnetwork 140, the authorizing entity computer 150, the acquirer computer135, or the merchant computer 130. For example, in some embodiments, atoken service provider may comprise an associated token vault 110 andtransaction processing network 140. The token vault 110 may be able toissue payment tokens, token codes, and domain IDs. The token vault 110may also be able to authenticate and de-tokenize payment tokens, tokencodes, and domain IDs.

An example of the token vault 110, according to some embodiments of theinvention, is shown in FIG. 2. The token vault 110 comprises a processor110A, a network interface 1108, a token database 110C, a token codedatabase 110D, a token requestor database 110E, and a computer readablemedium 110F.

The computer readable medium 110F may comprise an authentication module110G, a token generation module 110H, a token identification module110J, a token code generation module 110K, a communication module 110L,a de-tokenization module 110M, a registration module 110N, and any othersuitable module. It may also comprise code, executable by the processor110A for implementing a method comprising receiving a first tokenrequest from a first token requestor computer, wherein the first tokenrequest includes a value credential and a first domain identifier;identifying a value token associated with the value credential;generating a first token code associated with the value token; assigningthe value token and the first token code to the first domain identifier;transmitting the value token and the first token code to the first tokenrequestor computer, wherein the first token requestor subsequently usesthe value token for an interaction, and wherein the first tokenrequestor's subsequent use of the value token is valid if the valuetoken is accompanied by the first token code; receiving a second tokenrequest from a second token requestor computer, wherein the second tokenrequest includes the value credential and a second domain identifier;identifying the value token associated with the value credential;generating a second token code associated with the value token;assigning the value token and the second token code to the second domainidentifier; and transmitting the value token and the second token codeto the second token requestor computer, wherein the second tokenrequestor subsequently uses the value token for an interaction, andwherein the second token requestor's subsequent use of the value tokenis valid if the value token is accompanied by the second token code.

The authentication module 110G may comprise code that causes theprocessor 110A to authenticate a token requestor 115. For example, thetoken vault 110 can receive a token request from the token requestor115, the request including a domain ID that identifies the tokenrequestor 115, as well as a set of payment credentials that identify apayment account. The authentication module 110G may contain logic thatcauses the processor 110A to authenticate the domain ID or otherwiseauthenticate the token requestor. The authentication module 110G mayutilize information, such as stored domain IDs, from the token requestordatabase 110E.

The token generation module 110H may comprise code that causes theprocessor 110A to generate payment tokens. For example, the tokengeneration module 110H may contain logic that causes the processor 110Ato issue a payment token that can be used as surrogate payment accountinformation for a set of payment credentials included in a tokenrequest. Any suitable token generation process can be used. Suchprocesses can utilize hashing, encryption, or random token generationprocesses. A record of the token may be stored at the token database110C, and the record may include the token, token expiration date,associated payment account information, token assurance information,token requestor information (e.g. a domain ID), and/or any othersuitable information.

The token generation module 110H may be able to periodically updatepayment tokens. For example, new payment tokens can be generated andsent to replace old payment tokens, and the payment tokens can be storedin token database 110C.

The token identification module 110J may comprise code that causes theprocessor 110A to identify a payment token. For example, the tokenidentification module 110J may contain logic that causes the processor110A to identify a payment token that is associated with a set ofpayment credentials received in a token request. In some embodiments, apayment token may be assigned to more than one token requestor 115. Thepayment token may be generated when a first token requestor 115initially requests a token for the payment credentials. When a secondtoken requestor 115 requests a token for the same payment credentials,the token identification module 110J may be used to identify theexisting payment token, instead of generating another payment token. Thetoken identification module 110J also may update the record of thepayment token at the token database 110C to indicate that the secondtoken requestor 115 (e.g. the second domain ID) is also associated withthe payment token.

The token code generation module 110K may comprise code that causes theprocessor 110A to generate token codes. For example, the token codegeneration module 110K may contain logic that causes the processor 110Ato generate a token code associated with a payment token for a certaintoken requestor 115. Any suitable token code generation process can beused. Such processes can utilize hashing, encryption, or random tokengeneration processes. In some embodiments, when a payment token isprovided to a token requestor 115, a token code is also provided. Thetoken code may serve as a passcode for utilizing the payment token. Thetoken vault 110 may provide a different token code to each tokenrequestor that requests the same payment token. Thus, multiple tokenrequestors 115 may possess the same payment token, but they each mayhave a different token code for that payment token. In order to use thepayment token, a token requestor 115 may also need to provide theirtoken code.

The token code generation module 110K may also store a record of thetoken code at the token code database 110D. The record may indicate adomain ID and/or a payment token associated with the token code. Inaddition or alternatively, the token code generation module 110K maycause the record of the payment token at the token database 110C toindicate one or more token codes and/or domain IDs associated with thepayment token.

The token code generation module 110K may be able to periodically updatetoken codes. For example, new token codes can be generated and sent toreplace old token codes, and the new token codes can be stored in thetoken code database 110D.

The communication module 110L may comprise code that causes theprocessor 110A to communicate with one or more entities. For example,the communication module 110L may contain logic that causes theprocessor 110A to receive token requests and send payment tokens totoken requestors 115. The communication module 110L may also be able toreceive de-tokenization requests and send payment credentials to thetransaction processing network 140 and any other suitable entity.

The de-tokenization module 110M may comprise code that causes theprocessor 110A to de-tokenize a payment token. For example, thede-tokenization module 110M may contain logic that causes the processor110A to identify a set of payment credentials associated with a paymenttoken (e.g., as indicated in the token database 110C). Thede-tokenization module 110M may also be able to authenticate a paymenttoken by validating that a received token code and/or domain ID areassociated with the payment token (e.g., as indicated in the token codedatabase 110D). For example, the token vault 110 may receive requestsfor payment account information from the transaction processing network140, authorizing entity computer 150, and any other suitable entities.The token vault 110 may receive such a de-tokenization request includinga payment token, token code, and/or domain ID, the token vault 110 mayauthenticate the information and identify the associated paymentcredentials, and then the token vault 110 may provide the paymentaccount information to the de-tokenization requestor.

The token vault 110 may also allow the token requestor 115 to registerat the token vault 110. The registration module 110N may comprise codethat causes the processor 110A to register a token requestor 115. Forexample, the registration module 110N may contain logic that causes theprocessor 110A to receive a request to register from the token requestor115, the request including information about the token requestor 115,information about how tokens will be used (e.g. token domaininformation), a desired token assurance level, or any other suitableinformation. The token vault 110 may authenticate the identity of thetoken requestor 115, and the token vault 110 may approve or reject theregistration request. If approved, the token vault 110 may generate andissue a domain ID for the token requestor 115. The domain ID may serveto identify the token requestor 115 as well as a token domain for whichissued payment tokens will be used.

The registration module 110N may be able to periodically update domainIDs. For example, new domain IDs can be generated and sent to replaceold domain IDs, and the new domain IDs can be stored in the tokenrequestor database 110E.

Referring back to FIG. 1, a number of different entities can act as thetoken requestor 115, according to embodiments of the invention. Forexample, in some embodiments, the token requestor 115 can be a mobiledevice associated with the user 120. A user 120 may activate a mobilepayment functionality on the mobile device and request that a certainset of payment credentials are usable for mobile payments. In this case,the mobile device may request a payment token associated with thepayment credentials. Then, the user 120 can use the mobile device toprovide a payment to the merchant computer 130.

FIG. 3 shows an example of such a mobile device 315 that can act as atoken requestor 115 and/or be used for mobile payments, according tosome embodiments of the invention. Mobile device 315 may includecircuitry that is used to enable certain device functions, such astelephony. The functional elements responsible for enabling thosefunctions may include a processor 315A that can execute instructionsthat implement the functions and operations of the device. Processor315A may access memory 315E (or another suitable data storage region orelement) to retrieve instructions or data used in executing theinstructions, such as provisioning scripts and mobile applications. Datainput/output elements 315C, such as a keyboard or touchscreen, may beused to enable a user to operate the mobile device 315 and input data(e.g., user authentication data). Data input/output elements may also beconfigured to output data (via a speaker, for example). Display 315B mayalso be used to output data to a user. Communications element 315D maybe used to enable data transfer between mobile device 315 and a wired orwireless network (via antenna 315H, for example) to assist inconnectivity to the Internet or other network, and enabling datatransfer functions. Mobile device 315 may also include contactlesselement interface 315F to enable data transfer between contactlesselement 315G and other elements of the device, where contactless element315G may include a secure memory and a near field communications datatransfer element (or another form of short range communicationstechnology). As noted, a cellular phone or similar device is an exampleof a mobile device 315 that may be used in accordance with embodimentsof the present invention. However, other forms or types of devices maybe used without departing from the underlying concepts of the invention.For example, the mobile device 315 may alternatively be in the form of apayment card, a key fob, a tablet computer, a wearable device, etc.

The memory 315E may comprise a digital wallet application 315J, apayment module 315K, a token request module 315L, a credential storage315M, a payment token 315N, a domain ID 315P, a token code 315Q, and anyother suitable module or data. The mobile device 315 may have any numberof mobile applications installed or stored on the memory 315E and is notlimited to that shown in FIG. 3.

The digital wallet application 315J may comprise code that causes theprocessor 315A to provide digital wallet services. For example, thedigital wallet application 315J may contain logic that causes theprocessor 315A to provide a user interface for the user to provide inputand initiate, facilitate, and manage transactions using the mobiledevice 315. The digital wallet application 315F may be able to accesspayment credentials, such as the token 315N, the token code 315Q, andthe domain ID 315P stored in the credential storage 315M. Further, thedigital wallet application 315F may be able to obtain payment tokensfrom the token vault 110 (e.g., via the token request module 315L). Forexample, the token request module 315L may send a token requestincluding a set of payment credentials (which may have been provided bythe user 120) as well as a domain ID 315P associated with the mobiledevice 315.

The digital wallet application 315F may also be able to provide thepayment credentials for a transaction (e.g., via the payment module315L). In some embodiments, the digital wallet application 315F may beable to provide payment credentials for online payments and/or in-persontransactions (e.g., via short-range communication). In one example, thedigital wallet application 315F may generate single data element such asan NFC transmission packet or a QR code including the token 315N, thetoken code 315Q, and the domain ID 315P, and any other suitableinformation.

The credential storage 315M may be able to store one or more tokens315N, token codes 315Q, and domain IDs 315P. For example, the credentialstorage 315M may store credentials for one or more payment accounts, andthere may be a different token 315N and token code 315Q for each paymentaccount. The mobile device 315 may also be able to request paymenttokens for more than one token domain, and the mobile device 315 may usea different domain ID 315P for each different token domain. If one token315N is used for multiple domains (e.g., in-person contactless paymentsand online payments), the mobile device 315 may possess a differenttoken code 315Q for each domain (and domain ID 315P).

Referring back to the token requestor 115 in FIG. 1, in someembodiments, the merchant computer 130 can act as the token requester115. For example, the merchant computer 130 can have a card-on-file forthe user 120. Instead of storing the user's sensitive paymentcredentials, the merchant computer 130 may be able to request and storean associated payment token. In this case, when the user 120 makes apurchase at the merchant computer 130, the merchant computer 130 cansubmit the stored payment token for the transaction. In otherembodiments, the merchant computer 130 may not be a token holder, andmay instead receive a payment token from the mobile device 315 during atransaction.

An example of the merchant computer 130 (e.g., a server computeroperated by the merchant), according to some embodiments of theinvention, is shown in FIG. 4. The merchant computer 130 comprises aprocessor 130A, a communication interface 130B, a network interface130C, a credential database 130D, a user database 130E, and a computerreadable medium 130F.

The computer readable medium 130F may comprise a transaction processingmodule 130G, a global analysis module 130H, an authorization module130J, a token request module 130K, a token receive module 130L, and anyother suitable module.

The transaction processing module 130G may comprise code that causes theprocessor 130A to process transactions. For example, the transactionprocessing module 130G may contain logic that causes the processor 130Ato receive payment credentials (e.g., a payment token) from the user 120for a transaction. In some embodiments, the merchant computer 130 maystore a payment token associated with the user 120 (e.g., at thecredential database 130D), and the transaction processing module 130Gidentify the payment token when the user 120 initiates a purchase. Thetransaction processing module 130G may be able to initiate transactionauthorization (using either received payment credentials or anidentified payment token), and may also be able to finalize atransaction so that goods and/or services can be released.

The global analysis module 130H may comprise code that causes theprocessor 130A to analyze payment credentials. For example, the globalanalysis module 130H may contain logic that causes the processor 130A touse a payment token to track user 120 spending habits.

In some embodiments, the global analysis module 130H may use a paymenttoken as a user 120 identifier instead of a PAN. The global analysismodule 130H may keep a record (e.g., at the user database 130E) of user120 trends by recording transactions that involve the payment token. Asexplained above, in some embodiments, the same payment token thatrepresents a certain payment account can be provided to multiple tokenrequestors 115. As a result, the payment token may be static, so thatthe same payment token is provided each time a user 120 uses a certainpayment account at a merchant computer 130, even if the token code,domain ID, and/or token domain can vary. For example, in someembodiments, one payment account may be associated with several digitalwallets, and each digital wallet may have the same payment tokenassociated with the same payment account. The merchant computer 130 mayreceive the same payment token whenever any of these different digitalwallets are used. Thus, the global analysis module 130H may be able torecognize a payment account by a received payment token.

In some embodiments, the payment token may comprise 16, 18, or 19 digitsand can be formatted as a PAN so that merchants 130 can easily integratea payment token into an existing user-tracking system that typicallyuses a PAN for user tracking. For example, users are sometimesidentified by a portion of the PAN known as “field 2”. Payment tokensmay also include a “field 2” that can similarly identify a paymentaccount or user. The payment token may replace a PAN for any suitableidentification purpose. A payment token may also be formatted toindicate an authentication entity 150 and/or a token vault 110.

In some embodiments, the merchant computer 130 (e.g., via the globalanalysis module 130H) may use the payment token and associated userpurchase record for other applications including value added servicessuch as loyalty programs, backend applications, and reporting. Forexample, the payment token may function as a user 120 loyalty identifierfor tracking loyalty points (e.g., at the user database 130E) andproviding rewards or special offers.

The merchant computer 130 (or other entity) may also use the paymenttoken for fraud/risk checks during authorization. For example, themerchant computer 130 (e.g., via the global analysis module 130H) may beable to detect high-velocity transactions. If too many transactionsassociated with the payment token occur within a certain amount of time,the merchant computer 130 may suspect fraudulent activity. The merchantcomputer 130 may then reject further transactions involving the paymenttoken. Alternatively, the merchant computer 130 may mark the paymenttoken as high-risk or put the payment token on a “blacklist.” Themerchant computer 130 may also use the payment token to reviewfraud/risk levels after a transaction is authorized.

The merchant computer 130 may use the payment token to access pasttransactions. For example, the merchant computer 130 may use the paymenttoken to identify a past transaction (e.g., stored in the user database130E) for a refund or an inquiry.

The payment token may also be used for providing a transaction feed tothird party value added applications. For example, the merchant computer130 may inform third party applications about user 120 purchases andtrends that are tracked via the payment token. A third-party may use atransaction feed for providing rewards or offers to the user 120 in realtime or offline (e.g., in a statement of credit).

The authorization module 130J may comprise code that causes theprocessor 130A to send and receive authorization messages. For example,the authorization module 130J may contain logic that causes theprocessor 130A to generate an authorization request message includingpayment credentials (e.g., a payment token, token code, domain ID, name,etc.), transaction data, and any other relevant information, and thensend the authorization request message to the acquirer computer 135. Anauthorization response message from the acquirer computer 135 can alsobe received and processed.

The token request module 130K may comprise code that causes theprocessor 130A to request payment tokens. For example, the token requestmodule 130K may contain logic that causes the processor 130A to send atoken request to the token vault 110, the token request including a setof payment credentials (which may have been provided by the user 120) aswell as a domain ID 315P associated with the merchant computer 130.

The token receive module 130L may comprise code that causes theprocessor 130A to receive and store payment tokens and other associatedcredentials. For example, the token receive module 130L may containlogic that causes the processor 130A to receive a requested paymenttoken along with an associated token code, domain ID, and/or any othersuitable information. The token receive module 130L may be able to storeany received payment tokens and associated information in the credentialdatabase 130D. The merchant computer 130 may store payment tokens forusers 120 that wish to store payment account information at the merchantcomputer 130 (e.g., for convenience). The merchant computer 130 may beable to submit a stored payment token for one or more purchasesinitiated by the user 120.

The credential database 130D may be able to store one or more paymenttokens, token codes, and/or domain IDs. For example, the credentialstorage 130D may store credentials for one or more payment accounts, andthere may be a different payment token and token code for each paymentaccount. The merchant computer 130 may also be able to request paymenttokens for more than one token domain, and the merchant computer 130 mayuse a different domain ID for each different token domain.

Referring back to the token requestor 115 in FIG. 1, in someembodiments, the token requestor 115 may be a token aggregator. Forexample, a token aggregator may request tokens on behalf of one or moredigital wallet providers. A digital wallet provider may prefer not toregister with a token vault 110 and instead receive tokens from thetoken aggregator. Digital wallet providers may receive tokens from atoken aggregator and then provide the tokens to users and mobile devicesthat use a digital wallet. In some embodiments, a token requestor 115may be able to request and collect tokens from multiple token vaults 110or token service providers, and may request tokens that are valid formultiple transaction processing networks 140. The token requestor 115may register with each token vault 110 separately.

Referring back to FIG. 1, the acquirer computer 135 may be associatedwith the merchant computer 130, and may manage authorization requests onbehalf of the merchant computer 130. The acquirer computer 135 mayreceive an authorization request message including payment informationfrom the merchant computer 130 and send the authorization requestmessage to the transaction processing network 140.

As explained above, in some embodiments, the same payment token thatrepresents a certain payment account can be held and used by differenttoken requestors 115 (e.g., mobile devices 315, merchants 130,third-party token providers, etc.). As a result, each time the paymentaccount is used for a transaction, the acquirer computer 135 may receivethe same payment token in an authorization request message, regardlessof the payment domain. As a result, the acquirer computer 135 may alsobe able use the payment token to track user 120 activity, as alreadydescribed for the merchant computer 130 above.

For example, the acquirer computer 135 may use the payment token foronline fraud analysis, offline fraud analysis, loyalty services, thirdparty loyalty programs, reporting to merchants, or any other suitablepurpose. For example, in some embodiments, the acquirer computer 135 mayflag a payment account (identified by a payment token) and an associatedmerchant computer 130 for fraud/risk level scoring. In another example,a payment token may be used for providing card-linked offers. In anotherexample, the acquirer computer 135 may provide a user transaction reportto merchants, the report including transactions that involved a certainpayment token.

As shown in FIG. 1, the transaction processing network 140 may bedisposed between the acquirer computer 135 and the authorizing entitycomputer 150. The transaction processing network 140 may include dataprocessing subsystems, networks, and operations used to support anddeliver authorization services, exception file services, and clearingand settlement services. For example, the transaction processing network140 may comprise a server coupled to a network interface (e.g., by anexternal communication interface), and a databases of information. Anexemplary transaction processing network 140 may include VisaNet™.Transaction processing networks such as VisaNet™ are able to processcredit card transactions, debit card transactions, and other types ofcommercial transactions. VisaNet™, in particular, includes a VIP system(Visa Integrated Payments system) which processes authorization requestsand a Base II system which performs clearing and settlement services.The transaction processing network 140 may use any suitable wired orwireless network, including the Internet.

The transaction processing network 140 may be capable of de-tokenizing atoken in an authorization request message. For example, the transactionprocessing network 140 may receive an authorization request messageincluding a payment token, a token code, and/or a domain ID. Thetransaction processing network 140 may be able to send the receivedinformation to the token vault 110, then receive associated paymentaccount information from the token vault 110, and then forward theauthorization request message to the authorizing entity computer 150with the payment account information. The transaction processing network140 may also receive an authorization response message with the paymentaccount information, and replace some or all of the payment accountinformation with the payment token, token code, and/or domain ID (e.g.,via the token vault 110) before forwarding the message to the acquirercomputer 135.

In some embodiments, the token vault 110 and the transaction processingnetwork 140 may form a token service system.

The transaction processing network 140, the acquirer computer 135, andthe authorizing entity computer 150 may operate suitable routing tablesto route authorization request messages using account identifiers suchas PANs or tokens. Token routing data may be provided or maintained bythe token vault 110, and may be communicated to any of the entities inFIG. 1.

Referring back to FIG. 1, The authorizing entity computer 150 may managea payment account of the user 120. The authorizing entity computer 150may be able authorize transactions that involve the payment account.

The token network 145 may also be able to provide de-tokenizationservices. The token network 145 may include another transactionprocessing network, another token vault, and/or another token requestor.For example, in some embodiments, the transaction processing network 140may receive a payment token that is associated the token network 145instead of the token vault 110. In order to de-tokenize the token forauthorization, the transaction processing network 140 may send thetoken, token code, and/or domain ID to the token network 145, which maythen authenticate the information and return the payment credentials. Insome embodiments, the token network 145 may wish to de-tokenize a tokenthat is associated with the transaction processing network 140, and mayobtain associated payment account information by similarly communicatingwith the transaction processing network 140 and token vault 110.

FIG. 5 shows a block diagram illustrating the use of token codes forvarious domains, in accordance with some embodiments of the invention.FIG. 5 depicts a payment card 510, a payment token 520, and a pluralityof merchants (which could be other types of token requestors, in someembodiments), including a first merchant 530, second merchant 540, andthird merchant 550. The payment card 510 may be associated with a userand a PAN, e.g., “4123 4567 8910 1112”. Each merchant may wish to storepayment credentials associated the user. Instead of storing the PAN, themerchant each may request a payment token. A token service provider(e.g., token vault 110) may generate a payment token 520 to beassociated with the PAN, as described with respect to FIG. 1. Forexample, the payment token 520 associated with the PAN could be “49991111 2222 3333.” Each merchant may receive the payment token 520, andthen the payment token 520 may be passed in various authorizationrequest and response messages during a transaction, instead of the PAN.In some embodiments, one or more of the merchants may instead be amobile device 315. To enable a contactless transactions on the mobiledevice 315, the user may enroll the payment card 510 with a digitalwallet application or payment application on the mobile device 315, andthe payment token 520 may be provisioned to the mobile device 315. Also,in some embodiments, the domains can be various acquirers involved intransactions.

As can be seen in FIG. 5, the same payment token 520 can be assigned toeach domain (e.g., first domain 530, second domain 540, third domain550). This may be in contrast to existing implementations in which adifferent payment token 520 may need to be generated for each separatedomain. Each domain may be associated with a domain ID. For example, thefirst domain 530 may have a domain ID of 123456789101 (also referred toas “101”), the second domain 540 may have a domain ID of 123456789102(also referred to as “102”), and the third domain 550 may have a domainID of 123456789103 (also referred to as “103”).

In addition to the payment token 520, token codes associated with thepayment token may also be generated. A different token code may beassigned to each domain when requesting access to the payment token 520.For example, the first domain 530 may have a token code of “A53B9”, thesecond domain 540 may have a token code of “1D5F6”, and the third domain550 may have a token code of “6789A”. A token code may be a sharedsecret between the domain and the token provider. Accordingly, tokencodes may be protected by encryption, secure storage, and any othersuitable safeguarding. In some embodiments, the token code may also beused in the creation of a cryptogram. Token codes may also beperiodically replaced and updated.

The combination of the payment token 520 and a token code may constitutea unique combination. Thus, while each domain may possess the samepayment token 520, each domain may possess a unique token code for thepayment token 520.

The token code may be a hexadecimal value, although the token code couldbe any other alphabetical, numeric, or alphanumeric value. In someembodiments, the token code may be indicative of the specific domain forwhich it was obtained.

The token code may be generated by the same token provider thatgenerated the payment token 520. The holder of the payment token 520(e.g., merchant, digital wallet application, etc.) may receive and storeboth the payment token 520 and the token code at the same time. Thepayment token 520 and the token code may also be updated at any time fora number of reasons, including to prevent a security threat (e.g.,fraudulent transactions).

The token code may be specific to the domain so that transactionauthentication may occur on the combination of the payment token 520,the token code, and/or the domain ID (along with merchant ID, acquirerBIN/PCR, etc.). Thus, in order for the first merchant 530 to utilize thepayment token 520 for a transaction, the first merchant 530 may need toprovide the token code “A53B9” and/or the domain ID “101” along with thepayment token 520 for the transaction. Then, the token vault 110 canauthenticate the payment token 520, the token code “A53B9”, and/or thedomain ID “101”. Further, the token vault 110 can verify that thepayment token 520, the token code “A53B9”, and/or the domain ID “101”are all associated with one another. The token vault 110 therebyverifies that the first merchant 530 is authorized to utilize thepayment token 520. Thus, the payment token 520 may be distributed tomultiple entities, but the payment token 520 may only be usable if it isaccompanied by an authentic token code and/or domain ID.

For example, the second merchant 540 may be able to use the paymenttoken 520, but the second merchant 540 may need to provide its tokencode “1D5F6” and its domain ID “102”. If a fraudster attempts to use thepayment token 520 and provides an illegitimate token code, anillegitimate domain ID, or a mismatching token code and domain ID (e.g.,token code “A53B9” and domain ID “103”), the transaction may be rejectedas potentially fraudulent.

Accordingly, the domains (e.g., merchants, acquirers, etc.) may be ableto have a unique identifier (i.e. the payment token 520) for which totrack transactions for risk, fraud, and other analytical metrics.Transactions can be further tracked, divided, analyzed based on thedifferent domain IDs used transactions.

Payment tokens can be a secure replacement for PANs, and may beformatted similarly to PANs. Accordingly, such an implementation wouldnot require a great deal of infrastructure changes on the part of thedomains, and may allow for risk and loyalty management on the part ofthe domains. Since the payment token 520 can be the same across thevarious domains, less infrastructure change may be required on the partof the domains than would be required for implementations involvingproviding a unique payment token 520 for each domain.

It can be appreciated that the implementation described with respect toFIG. 5 may allow the use of a single payment token 520 across aplurality of domains. The combination of the single payment token 520with the great number of possible token codes may allow for a largenumber of unique combinations. This may be effective for shared BINs.

Additionally, in some embodiments, it may be possible to use token codesin conjunction with a PAN. Instead of introducing the payment token 520,the PAN may be maintained under the condition that a token code shouldbe provided with the PAN. Thus, similar to the payment token 520, thePAN can be widely distributed, but only usable for authorized domainswhere a token code and/or domain ID have been assigned.

A method 600 according to embodiments of the invention can be describedwith respect to FIG. 6. Some elements in other Figures are also referredto. The steps shown in the method 600 may be performed sequentially orin any suitable order in embodiments of the invention. In someembodiments, one or more of the steps may be optional.

The various messages in FIG. 6 may use any suitable form ofcommunication. In some embodiments, a request or response may be in anelectronic message format, such as an e-mail, a short messaging service(SMS) message, a multimedia messaging service (MMS) message, a hypertexttransfer protocol (HTTP) request message, a transmission controlprotocol (TCP) packet, a web form submission. The request or responsemay be directed to any suitable location, such as an e-mail address, atelephone number, an internet protocol (IP) address, or a uniformresource locator (URL). In some embodiments, a request or response maycomprise a mix of different message types, such as both email and SMSmessages.

In the method 600 described below, the mobile device 315 is the tokenrequestor. However, as discussed above, in some embodiments the tokenrequestor may alternatively be a merchant, a third-party token provider,or any other suitable entity.

At step S602, the user 120 may indicate a desire to have paymentcredentials provisioned onto the mobile device 315. For example, theuser 120 may provide a PAN or other suitable payment credentials to thedigital wallet application 315J.

At step S604, the mobile device 315 may send a token request to thetoken vault 110 (e.g., via the token request module 315L). The tokenrequest may include the payment credentials (e.g., the PAN, expirationdate, etc.). The token request may also include mobile device 315identifying information, such as the domain ID 315P, and any othersuitable information.

At step S606, the token vault 110 may authenticate the mobile device315. The token vault 110 can check the payment credentials, device ID,etc. Also, the token vault 110 may verify that the domain ID 315P isvalid in the token requestor database 110E (e.g., via the authenticationmodule 110G).

At step S608, the token vault 110 may identify a payment token that isassociated with the payment credentials in the token database 110C(e.g., via the token identification module 110J). For example, a paymenttoken may already have been generated for the payment credentials foranother token requestor. If there is no payment token already associatedwith the payment credentials, the token vault 110 may generate a paymenttoken, create an association between the payment token and the receivedpayment credentials, and store a record of the payment token in thetoken database 110C (e.g., via the token generation module 110H).

At step S610, the token vault 110 may generate a token code for themobile device 315 to use in conjunction with the payment token (e.g.,via the token code generation module 110K).

At step S612, the token vault 110 may store a record indicating anassociation between the token code, the payment token, and the domain IDat the token code database 110D and/or the token database 110C (e.g.,via the token code generation module 110K). For example, the token codeand domain ID may be added to a list of token codes and domain IDs thatare authorized to use the payment token. In another example, the paymenttoken and token code may be added to a list of payment tokens and tokencodes that the domain ID is authorized to use.

At step S614, the token vault 110 may send a token response to themobile device 315. The token response may include the payment token, thetoken code, and/or the domain ID.

At step S616, the mobile device 315 may store the payment token 315N,the token code 315Q, and/or the domain ID 315P (e.g., at the credentialstorage 315M). This may conclude the token provisioning process, and themobile device 315 may then be able to utilize the payment token 315N formobile transactions.

At step S618, the user 120 may initiate a purchase. For example, theuser 120 may activate the digital wallet application 315J, and mayindicate a desire to make a payment (e.g., by selecting a “payment”option). The user 120 may wish to purchase a good or service at themerchant computer 130 via the mobile device 315. Further, the user 120may select a payment account within the digital wallet application 315J(e.g., by selecting a visually displayed icon representing a paymentaccount), and present the mobile device 315 to an access device fortransmitting the payment information.

At step S620, the mobile device 315 may provide the payment token 315N,the token code 315Q, the domain ID 315P, and/or any other suitableinformation to the merchant computer 130 for the transaction (e.g., viathe payment module 315K). For example, the mobile device 315 may providethe payment information via short-range communication to a merchantaccess device. The token code 315Q may be encrypted or otherwiseprotected during transmission, such that only the token vault 110 candecrypt and view the token code 315Q.

At step S622, the merchant computer 130 may analyze the payment tokenand/or the domain ID. For example, the merchant computer 130 may trackuser 120 activity based on the payment token, and may use the paymenttoken to perform fraud risk analysis (e.g., check a blacklist anddetermine transaction velocity), process loyalty-related services,update a user 120 record, and perform any other suitable operations(e.g., via the global analysis module 130H). The merchant computer 130may not view or utilize the token code, and may simply pass the tokencode along in the authorization request message.

At step S624, the merchant computer 130 may send an authorizationrequest message to the acquirer computer 135. The authorization requestmessage may include transaction information, the payment token, thetoken code, the domain ID, and any other suitable information.

At step S626, the acquirer computer 135 may optionally analyze thepayment token 315N and/or the domain ID. For example, the acquirercomputer 135 may track user 120 activity based on the payment token, andmay use the payment token to perform fraud risk analysis (e.g., check ablacklist and determine transaction velocity), process loyalty-relatedservices, update a user 120 record, and perform any other suitableoperations. The acquirer computer 135 may not view or utilize the tokencode, and may simply pass the token code along in the authorizationrequest message.

At step S628, the acquirer computer 135 may forward the authorizationrequest message to the transaction processing network 140.

At step S630, the transaction processing network 140 may determine thata payment token is included in the authorization request message. Thetransaction processing network 140 may send a de-tokenization request tothe token vault 110, the de-tokenization request including the paymenttoken, the token code, the domain ID, and/or any other suitableinformation.

At step S632, the token vault 110 may authenticate the payment token,the token code, and/or the domain ID (e.g., via the authenticationmodule 110G, the token database 110C, and/or the token code database110D). For example, the token vault 110 may validate that the paymenttoken, the token code, and/or the domain ID are all associated with oneanother. The token vault 110 may confirm that the mobile device 315 isauthorized to use the payment token. For example, the token vault 110may confirm that the token code was issued to the mobile device 315(e.g., it was assigned to the domain ID).

At step S634, the token vault 110 may identify the payment credentials(e.g., the PAN) that are associated with the payment token in the tokendatabase 110C (e.g., via the de-tokenization module 110G).

At step S636, the token vault 110 may send a de-tokenization response tothe transaction processing network 140, the de-tokenization responseincluding the payment credentials.

At step S638, the transaction processing network 140 may add the paymentcredentials to the authorization request message and forward theauthorization request message to the authorizing entity computer 150.The transaction processing network 140 may optionally remove the paymenttoken, the token code, and/or the domain ID from the authorizationrequest message.

At step S640, the authorizing entity computer 150 then determineswhether or not the transaction should be authorized. The authorizingentity computer 150 may check the status of the payment account, conductany appropriate fraud or credit checks, and perform any other suitableprocessing in order to determine whether or not to approve of thetransaction.

At step S642, the authorizing entity computer 150 then generates andsends an authorization response message back to the transactionprocessing network 140.

At step S644, the transaction processing network 140 may remove thepayment credentials from the authorization response message. Thetransaction processing network 140 may also reformat the authorizationresponse message to include the payment token, the token code, and/orthe domain ID. In some embodiments, the token code may not be includedin the authorization response message, as the token code may not bereadable or useful to the acquirer computer 135 or merchant computer130. In some embodiments, the transaction processing network 140 mayobtain the payment token, the token code, and/or the domain ID from thetoken vault 110 in order to include the information in the authorizationresponse message.

At step S646, the transaction processing network 140 may then forwardthe authorization response message to the acquirer computer 135.

At step S648, the acquirer computer 135 may forward the authorizationresponse message to the merchant computer 130.

At step S650, the merchant computer 130 may release the purchased goodsand/or services to the user 120 based on the authorization responsemessage.

At the end of the day or at some other predetermined interval of time, aclearing and settlement process between the authorizing entity computer150, the transaction processing network 140, and the acquirer computer135 may occur. In the clearing and settlement process, accountinformation and token exchanges that are similar to those in theabove-described authorization processing steps can occur.

Accordingly, it may be possible to replace sensitive payment credentialswith the payment token for purchases, but it may still be possible totrack user 120 activity based on the payment token, as the payment tokencan remain static and can be submitted by multiple entities. Thesecurity of the payment token can be maintained by incorporating thetoken code and the domain ID, as the payment token may only be valid ifaccompanied by a valid token code and domain ID. Thus, with minimalchanges to existing systems, payment security is improved withoutsacrificing the ability to track user 120 activity.

FIG. 7 shows a flow diagram illustrating a method for sharing a tokenaccording to embodiments of the invention.

Before describing FIG. 7, it is helpful to discuss why a token might beshared. Merchants and other entities sometimes share user paymentcredentials. For example, a user may book a hotel room via a hotelreservation website (the first merchant), and the website may forwardthe user's payment credentials to the hotel (the second merchant). Thiscan allow the hotel to process any room charges and otherwise utilizethe user's payment credentials. Also, many merchant systems use paymentcredentials to generally keep track of a user. For example, instead ofgenerating a new reservation number, the website and/or hotel may usethe payment credentials as a unique reservation number. When otherwisecommunicating about the user, the website and hotel may identify theuser by the payment credentials. In addition to business agreements,many other scenarios exist where different payment credential holdingentities share the user's payment credentials and track the user bypayment credentials.

Accordingly, in payment token systems, token holding entities may wantto share payment tokens in the same way that other payment credentialshave been shared in the past. However, in typical payment token systems,payment tokens are uniquely assigned to a domain. Only the token holdercan use the payment token, so the payment token cannot be functionallyshared. If a payment token is used in the wrong domain, the transactionmay be rejected. For example, the hotel reservation website may havebeen provisioned with a payment token associated with a user. The hotelreservation website could send the payment token to the hotel, but thehotel will not be able to use the payment token.

Another problem with typical tokenization systems is that the user canno longer be tracked. In the past, the user could be tracked by a PANacross merchants and acquirers. However, in token systems, there may bymultiple payment tokens associated with the same PAN. Accordingly,different merchants and domains cannot identify the user by a singlestatic number, as they have done with the PAN in the past.

Embodiments of the invention solve these problems by using a singlepayment token. The user can be identified with the single payment tokenacross domains (e.g., merchants and acquirers), similarly to how usershave been tracked with a PAN in the past. However, embodiments are moresecure than previous systems that shared the PAN, as the single paymenttoken can only be used in authorized domains. If a domain is authorizedto use the payment token, it may have a token code and domain ID toprove it.

In some embodiments, token holders/requestors may be able to sharepayment tokens, as discussed above. However, to maintain security, if atoken holder receives a payment token from another token holder, insteadof from the token vault, that token holder may need to seekauthorization to use the token from the token vault. An example of sucha token-sharing process, according to embodiments of the invention, canbe described with respect to FIG. 7.

A first token requester 115 may possess a payment token, a first tokencode, a first domain ID, and any other suitable information associatedwith a user payment account. The first token requestor 115 may want toshare the payment token with a second token requestor 715. The firsttoken requestor 115 and the second token requestor 715 may each be amerchant, mobile device, third-party token provider, or any othersuitable entity.

At step S702, the first token requestor 115 may send the payment tokento the second token requestor 715. The first token code may be withheldfrom the second token requestor 715, as it may be a shared secret thatis only usable by the first token requestor 115. The first domain IDalso be withheld, as it may be an identifier for the first tokenrequestor 115 alone, and it may only be valid for the first tokenrequestor 115.

At step S704, the second token requestor 715 may send a permissionrequest to the token vault 110. The permission request may include thepayment token, a second domain ID associated with the second tokenrequestor 715, and any other suitable information. A permission requestmay differ from a token request in that a permission request includes apayment token, while a token request includes a PAN (or other suitablepayment credentials).

At step S706, the token vault 110 may authenticate the second tokenrequestor 715. For example, the token vault 110 may verify that thesecond domain ID is valid in the token requestor database 110E (e.g.,via the authentication module 110G), or otherwise authenticate that thesecond token requestor 715 is eligible to receive payment tokens. If thesecond token requestor 715 is not yet registered with the token vault110 and/or does not have a domain ID, the second token requestor 715 maybe prompted to register before a second token code is generated.

At step S708, the token vault 110 may generate a second token code forthe second token requestor 715 to use in conjunction with the paymenttoken (e.g., via the token code generation module 110K).

At step S710, the token vault 110 may store a record indicating anassociation between the second token code, the payment token, and thesecond domain ID at the token code database 110D and/or the tokendatabase 110C (e.g., via the token code generation module 110K). Forexample, the second token code and the second domain ID may be added toa list of token codes and domain IDs that are authorized to use thepayment token. In another example, the payment token and the secondtoken code may be added to a list of payment tokens and token codes thatthe domain ID is authorized to use.

At step S712, the token vault 110 may send a permission response to thesecond token requestor 715. The token response may include the paymenttoken, the second token code, and/or the second domain ID.

At step S714, the second token requestor 715 may store the paymenttoken, the second token code, and/or the second domain ID. This mayconclude the token provisioning process, and the second token requestor715 may thereby be granted authorization to utilize the payment tokenfor transactions.

Once the second token requestor 715 receives the payment token from thefirst token requestor 115, the two entities may be able to use thepayment token to identify the user 120 when communicating about the user120. Further, once the second token requestor 715 has the second tokencode, the second token requestor 715 may be able to use the paymenttoken to submit charges associated with the user 120.

Embodiments of the invention have a number of advantages. Tokenproliferation issues are solved, as introducing token codes allowspayment tokens to be re-used for multiple domains and transactions. Inprevious systems, there was a risk that the total number of possibletoken values would be exhausted, as multiple tokens were being rapidlydistributed for single payment accounts. In contrast, token codes allowsingle payment tokens to be safely distributed to multiple tokenholders. In some embodiments, token codes can effectively serve todifferentiate a single payment token into multiple unique (paymenttoken+token code) pairs. Also, because introducing token codes reducesthe amount of unique payment tokens needed, it may be easier to dividelimited token BIN space among smaller issuers.

Additionally, embodiments allow tokens to be introduced withoutinterrupting the user-activity tracking programs of several entities(e.g., acquirers, merchants). Entities that previously tracked a user'spayment account activity based on a PAN can continue to track useractivity based on a similarly formatted payment token that may now bepresent in each transaction involving the payment account.

Further, payment security can be increased. Instead of exposingsensitive payment credentials (e.g., a PAN), a payment token can beused. In some embodiments, additional authentication takes places whenthe payment token is used for a transaction. For example, a valid tokencode and corresponding domain ID may need be provided with the paymenttoken. Token codes and domain IDs may only be available to registeredtoken requestors. Thus, the entity submitting the payment token can beidentified, and a shared secret (i.e., the token code) may protect thepayment token from being fraudulently used. Additionally, paymenttokens, token codes, and domain IDs can be refreshed periodically.

Another advantage in embodiments is that the system may be relativelyeasy to adopt. Merchants, acquirers, and other involved entities may beable to engage in the token system by simply passing along a token codeand/or domain ID in an authorization message. Applications thatpreviously relied on a PAN, such as loyalty, merchant-to-merchantcommunication, and other user tracking applications, may still functionby utilizing the payment token (which may appear similar to the PAN).The token vault may be able to orchestrate issuing, authentication, andmaintenance of payment tokens, token codes, and domain IDs such thatother entities are not burdened. Also, in some embodiments, currentauthorization message formats may be able to accommodate the addition ofthe token code and/or domain ID without needing to add new fields orotherwise change the format of the messages. Thus, embodiments mayprovide an easy transition from traditional payment systems into tokensystems.

FIG. 8 is a high-level block diagram 11 of a computer system that may beused to implement any of the entities or components described above. Thesubsystems shown in FIG. 8 are interconnected via a system bus 75.Additional subsystems include a printer 74, keyboard 78, storage device79, and monitor 76, which is coupled to display adapter 82. Peripheralsand input/output (I/O) devices, which couple to I/O controller 71, canbe connected to the computer system by any number of means known in theart, such as a serial port. For example, I/O port 77 or externalinterface 81 can be used to connect the computer apparatus to a widearea network such as the Internet, a mouse input device, or a scanner.The interconnection via system bus 75 allows the central processor 73 tocommunicate with each subsystem and to control the execution ofinstructions from system memory 72 or the storage device 79, as well asthe exchange of information between subsystems. The system memory 72and/or the storage device may embody a computer-readable medium.

As described, the inventive service may involve implementing one or morefunctions, processes, operations or method steps. In some embodiments,the functions, processes, operations or method steps may be implementedas a result of the execution of a set of instructions or software codeby a suitably-programmed computing device, microprocessor, dataprocessor, or the like. The set of instructions or software code may bestored in a memory or other form of data storage element which isaccessed by the computing device, microprocessor, etc. In otherembodiments, the functions, processes, operations or method steps may beimplemented by firmware or a dedicated processor, integrated circuit,etc.

Any of the software components or functions described in thisapplication may be implemented as software code to be executed by aprocessor using any suitable computer language such as, for example,Java, C++ or Perl using, for example, conventional or object-orientedtechniques. The software code may be stored as a series of instructions,or commands on a computer-readable medium, such as a random accessmemory (RAM), a read-only memory (ROM), a magnetic medium such as ahard-drive or a floppy disk, or an optical medium such as a CD-ROM. Anysuch computer-readable medium may reside on or within a singlecomputational apparatus, and may be present on or within differentcomputational apparatuses within a system or network.

While certain exemplary embodiments have been described in detail andshown in the accompanying drawings, it is to be understood that suchembodiments are merely illustrative of and not intended to berestrictive of the broad invention, and that this invention is not to belimited to the specific arrangements and constructions shown anddescribed, since various other modifications may occur to those withordinary skill in the art.

As used herein, the use of “a”, “an” or “the” is intended to mean “atleast one”, unless specifically indicated to the contrary.

What is claimed is:
 1. A method comprising: receiving, by a processor ina token service computer, a first token request from a first tokenrequestor computer, wherein the first token request includes a paymentaccount number and a first domain identifier; identifying, by theprocessor in the token service computer, a payment token associated withthe payment account number; generating, by the processor in the tokenservice computer, a first token code associated with the payment token;assigning, by the processor in the token service computer, the paymenttoken and the first token code to the first domain identifier, such thatthe first token code is specific to a first domain associated with thefirst domain identifier; providing, by the processor in the tokenservice computer, the payment token and the first token code to thefirst token requestor computer, wherein the first token requestorsubsequently uses the payment token in place of the payment accountnumber for a first payment transaction, and wherein the first tokenrequestor's subsequent use of the payment token is valid if the paymenttoken is accompanied by the first token code and used within the firstdomain; receiving, by the processor in the token service computer, asecond token request from a second token requestor computer, wherein thesecond token request includes the payment account number and a seconddomain identifier, wherein the payment account number received in thesecond token request is the same as the payment account number receivedin the first token request; identifying, by the processor in the tokenservice computer, the payment token associated with the payment accountnumber; generating, by the processor in the token service computer, asecond token code associated with the payment token, wherein the secondtoken code is different than the first token code, and wherein thesecond token code and the first token code are both associated with thesame payment token; assigning, by the processor in the token servicecomputer, the payment token and the second token code to the seconddomain identifier, such that the second token code is specific to asecond domain associated with the second domain identifier, wherein thefirst domain identifier is different than the second domain identifier,and wherein the first domain is different than the second domain; andproviding, by the processor in the token service computer, the paymenttoken and the second token code to the second token requestor computer,wherein the second token requestor subsequently uses the payment tokenin place of the payment account number for a second payment transaction,wherein the second token requestor's subsequent use of the payment tokenis valid if the payment token is accompanied by the second token codeand used within the second domain.
 2. The method of claim 1, wherein thefirst token code is a first hexadecimal value and the second token codeis a second hexadecimal value.
 3. The method of claim 1, wherein thefirst domain includes e-commerce payment transactions and wherein thesecond domain includes in-person payment transactions.
 4. The method ofclaim 1, wherein the first token requestor computer is a merchantcomputer, wherein the payment account number is associated with a user,and wherein the merchant computer stores the payment token and the firsttoken code on behalf of the user, wherein the first domain identifier isassociated with the merchant computer, and wherein the first domainincludes transactions associated with the merchant computer.
 5. Themethod of claim 1, wherein the first token requestor computer is amobile device, wherein the mobile device is associated with a user, andwherein the payment account number is associated with the user, whereinthe first domain identifier is associated with the mobile device, andwherein the first domain includes transactions associated with themobile device.
 6. The method of claim 1, further comprising: receiving,by the processor in the token service computer, a first authorizationrequest message for the first payment transaction, the firstauthorization request message including the payment token, the firsttoken code, and the first domain identifier; determining, by theprocessor in the token service computer, that the first token code isassociated with the payment token; determining, by the processor in thetoken service computer, that the payment token and the first token codeare assigned to the first domain identifier; identifying, by theprocessor in the token service computer, the payment account numberassociated with the payment token; adding, by the processor in the tokenservice computer, the payment account number to the first authorizationrequest message; receiving, by the processor in the token servicecomputer, a first authorization response message including the paymentaccount number; and replacing, by the processor in the token servicecomputer, the payment account number with the payment token and thefirst token code in the first authorization response message.
 7. Themethod of claim 1, wherein the first token requestor's subsequent use ofthe payment token is valid if the payment token is accompanied by thefirst domain identifier, and wherein the second token requestor'ssubsequent use of the payment token is valid if the payment token isaccompanied by the second domain identifier.
 8. The method of claim 3,wherein the first token requestor's subsequent use of the payment tokenis valid if the payment token is used for an e-commerce paymenttransaction, and wherein the second token requestor's subsequent use ofthe payment token is valid if the payment token is used for an in-personpayment transaction.
 9. The method of claim 1, wherein the first domainincludes payment transactions with a first merchant, wherein the firstdomain identifier includes a first merchant identifier, wherein thesecond domain includes payment transactions with a second merchant, andwherein the second domain identifier includes a second merchantidentifier.
 10. The method of claim 9, wherein the first tokenrequestor's subsequent use of the payment token is valid if the firsttoken requestor is the first merchant, and wherein the second tokenrequestor's subsequent use of the payment token is valid if the secondtoken requestor is the second merchant.
 11. The method of claim 9,wherein the first token requestor's subsequent use of the payment tokenis valid if the payment token is accompanied by the first merchantidentifier, and wherein the second token requestor's subsequent use ofthe payment token is valid if the payment token is accompanied by thesecond merchant identifier.
 12. The method of claim 1, wherein the firstdomain includes a contactless entry mode and wherein the second domainincludes magnetic stripe entry mode.
 13. A token service computercomprising: a processor; and a non-transitory computer readable medium,the non-transitory computer readable medium comprising code, that whenexecuted by the processor, implementing a method comprising: receiving afirst token request from a first token requestor computer, wherein thefirst token request includes a payment account number and a first domainidentifier; identifying a payment token associated with the paymentaccount number; generating a first token code associated with thepayment token; assigning the payment token and the first token code tothe first domain identifier, such that the first token code is specificto a first domain associated with the first domain identifier; providingthe payment token and the first token code to the first token requestorcomputer, wherein the first token requestor subsequently uses thepayment token in place of the payment account number for a first paymenttransaction, wherein the first token requestor's subsequent use of thepayment token is valid if the payment token is accompanied by the firsttoken code and used within the first domain; receiving a second tokenrequest from a second token requestor computer, wherein the second tokenrequest includes the payment account number and a second domainidentifier, wherein the payment account number received in the secondtoken request is the same as the payment account number received in thefirst token request; identifying the payment token associated with thepayment account number; generating a second token code associated withthe payment token, wherein the second token code is different than thefirst token code, and wherein the second token code and the first tokencode are both associated with the same payment token; assigning thepayment token and the second token code to the second domain identifier,such that the second token code is specific to a second domainassociated with the second domain identifier, wherein the first domainidentifier is different than the second domain identifier, and whereinthe first domain is different than the second domain; and providing thepayment token and the second token code to the second token requestorcomputer, wherein the second token requestor subsequently uses thepayment token in place of the payment account number for a secondpayment transaction, wherein the second token requestor's subsequent useof the payment token is valid if the payment token is accompanied by thesecond token code and used within the second domain.
 14. The tokenservice computer of claim 13, wherein the first token code is a firsthexadecimal value and the second token code is a second hexadecimalvalue.
 15. The token service computer of claim 13, wherein the firstdomain includes e-commerce payment transactions and wherein the seconddomain includes in-person payment transactions.
 16. A method comprising:receiving, by a token service system, a first authorization requestmessage for a first payment transaction, the first authorization requestmessage including a payment token being used in place of a paymentaccount number, a first token code, and a first domain identifier;determining, by the token service system, that the first token code isassociated with the payment token; determining, by the token servicesystem, that the payment token and the first token code are assigned tothe first domain identifier, wherein the first token code is specific toa first domain associated with the first domain identifier; identifying,by the token service system, the payment account number associated withthe payment token; adding, by the token service system, the paymentaccount number to the first authorization request message; sending, bythe token service system, the first authorization request message to anauthorizing entity computer; receiving, by the token service system, afirst authorization response message including the payment accountnumber from the authorizing entity computer; replacing, by the tokenservice system, the payment account number with the payment token andthe first token code in the first authorization response message;forwarding, by the token service system, the first authorizationresponse message; receiving, by the token service system, a secondauthorization request message for a second payment transaction, thesecond authorization request message including the payment token, asecond token code, and a second domain identifier, wherein the tokenreceived in the second authorization request message is the same as thepayment token received in the first authorization request message;determining, by the token service system, that the second token code isassociated with the payment token, wherein the second token code isdifferent than the first token code, and wherein the second token codeand the first token code are both associated with the same paymenttoken; determining, by the token service system, that the payment tokenand the second token code are assigned to the second domain identifier,wherein the second code is different than the first token code, andwherein the second token code is specific to a second domain associatedwith the second domain identifier; identifying, by the token servicesystem, the payment account number associated with the payment token;adding, by the token service system, the payment account number to thesecond authorization request message; sending, by the token servicesystem, the second authorization request message to the authorizingentity computer; receiving, by the token service system, a secondauthorization response message including the payment account number fromthe authorizing entity computer; replacing, by the token service system,the payment account number with the payment token and the second tokencode in the authorization response message; and forwarding, by the tokenservice system, the second authorization response message.
 17. Themethod of claim 16 wherein the token service system comprises a tokenservice computer and a transaction processing network computer.
 18. Themethod of claim 16, wherein the first domain is different than thesecond domain.
 19. The method of claim 18, wherein the first domainincludes e-commerce payment transactions and wherein the second domainincludes in-person payment transactions.
 20. The method of claim 16,wherein the authorizing entity computer is an issuer computer thatissued a payment account associated with the payment account number. 21.A token service system comprising: a token service computer comprising afirst processor and a first non-transitory computer readable medium, thefirst non-transitory computer readable medium comprising code, that whenexecuted by the first processor to implement a method comprising:receiving a first payment account number request from a transactionprocessing network computer, the first payment account number requestincluding a payment token, a first token code, and a first domainidentifier; determining that the first token code is associated with thepayment token; determining that the payment token and the first tokencode are assigned to the first domain identifier, wherein the firsttoken code is specific to a first domain associated with the firstdomain identifier; identifying the payment account number associatedwith the payment token; and sending a first payment account numberresponse including the payment account number to the transactionprocessing network computer; and receiving a second payment accountnumber request from a transaction processing network computer, thesecond payment account number request including the payment token, asecond token code, and a second domain identifier: determining that thesecond token code is associated with the payment token: determining thatthe payment token and the second token code are assigned to the seconddomain identifier, wherein the second code is different than the firsttoken code, and wherein the second token code is specific to a seconddomain associated with the second domain identifier; identifying thepayment account number associated with the payment token; and sending asecond payment account number response including the payment accountnumber to the transaction processing network computer; and a transactionprocessing network computer in communication with the token servicecomputer, the transaction processing network computer comprising asecond processor and a second non-transitory computer readable medium,the second non-transitory computer readable medium comprising code, thatwhen executed by the second processor implementing a method comprising:receiving a first authorization request message for a first paymenttransaction, the first authorization request message including thepayment token, the first token code, and the first domain identifier;sending the first payment account number request to the token servicecomputer, the first payment account number request including the paymenttoken, the first token code, and the first token requestor; receivingthe first payment account number response including the payment accountnumber associated with the payment token from the token servicecomputer; adding the payment account number to the first authorizationrequest message; sending the first authorization request message to anauthorizing entity computer; receiving a first authorization responsemessage including the payment account number from the authorizing entitycomputer; replacing the payment account number with the payment tokenand the first token code in the first authorization response message;forwarding the first authorization response message; receiving a secondauthorization request message for a second payment transaction, thesecond authorization request message including the payment token, thesecond token code, and the second domain identifier; sending the secondpayment account number request to the token service computer, the secondpayment account number request including the payment token, the secondtoken code, and the second token requestor; receiving the second paymentaccount number response including the payment account number associatedwith the payment token from the token service computer; adding thepayment account number to the second authorization request message;sending the second authorization request message to an authorizingentity computer; receiving a second authorization response messageincluding the payment account number from the authorizing entitycomputer; replacing the payment account number with the payment tokenand the second token code in the second authorization response message;and forwarding the second authorization response message.
 22. The tokenservice system of claim 21, wherein the first token code is a firsthexadecimal value and the second token code is a second hexadecimalvalue.
 23. The token service system of claim 21, wherein the firstdomain is different than the second domain.
 24. The token service systemof claim 23, wherein the first domain includes e-commerce paymenttransactions and wherein the second domain includes in-person paymenttransactions.